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    <meta charset="UTF-8">
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    <title>Document</title>
</head>
<body>
    <script>
        async function main(){
            let p = new Promise((resolve,reject)=>{
                reject("error111");
            })
            // 1.右侧为promise的情况
            // let res = await p;
            
            // 2.右侧为其他类型的情况
            // let res2 = await 20;

            // 3.如果promise为失败的情况
            try {
                let res3 = await p;
            } catch (e) {
                console.log(e);
            }
        }

        main();
    </script>
</body>
</html>